Christina and Ali Christensen are sisters who both have cystic fibrosis and were told early in life they would never sing.

So much for never.  The Mormon sisters, from Idaho Falls, have advanced to the finals in NBC’s “America’s Got Talent” after  the Wednesday, Aug. 25th show.  They competed with 12 of the original 24 acts for five spots in the finals, singing “When You Believe.”

Here’s their number and the judge’s response.